Free Calculators & Tools for Students
Free Student Calculators
Calculate grades, percentages, GPA, attendance and more with our free student tools.
📚 Academic
Percentage Calculator
Work out your percentage from obtained marks and total marks in seconds.
Open calculatorMarks Calculator
Add marks across multiple subjects to get your total, average and overall percentage.
Open calculatorAverage Calculator
Find the average, sum and count of any list of numbers or scores.
Open calculatorGPA Calculator
Calculate your weighted GPA from course grades and credit hours.
Open calculatorCGPA Calculator
Calculate your CGPA across semesters and subjects from grade points.
Open calculatorCGPA to Percentage Calculator
Convert your CGPA to an estimated percentage using the standard 9.5 multiplier.
Open calculatorFinal Grade Calculator
Find out what grade you need on your final exam to reach your desired course grade.
Open calculatorExam Percentage Calculator
Calculate your exam percentage and see an approximate letter grade instantly.
Open calculatorGrade Calculator
Calculate your overall grade and letter grade from weighted assignments and tests.
Open calculator🎓 School & College
Attendance Calculator
Check your attendance percentage and how many classes you can attend or skip.
Open calculatorAttendance Shortage Calculator
Find out exactly how many classes you need to attend to reach a target attendance percentage.
Open calculatorStudy Time Calculator
Plan how to split your available hours across subjects before an exam.
📅 Date & Time
Age Calculator
Find your exact age in years, months and days from your date of birth.
Open calculatorExam Countdown
Count down the days, hours and minutes left until your next exam.
Open calculatorDate Difference Calculator
Find the number of days, weeks or months between two dates.
Why Use Student Calculator Hub?
Every calculator on this site is built to give students, parents and teachers a quick, accurate answer without clutter. There are no logins, no downloads and no unnecessary steps — just enter your numbers and get a result you can trust. Each tool also explains the formula behind the result, so you can understand the calculation, not just copy an answer.
Popular Student Calculators
Percentage Calculator
Work out your percentage from obtained marks and total marks in seconds.
Open calculatorCGPA Calculator
Calculate your CGPA across semesters and subjects from grade points.
Open calculatorGPA Calculator
Calculate your weighted GPA from course grades and credit hours.
Open calculatorAttendance Calculator
Check your attendance percentage and how many classes you can attend or skip.
Open calculatorHow Student Calculators Help
Grade and attendance calculations look simple, but small mistakes — a missed subject, a wrong denominator, an unrounded decimal — can throw off your report. Our calculators apply the standard formulas consistently, flag invalid entries before they produce a broken result, and let you recalculate instantly if your numbers change, whether you are checking a single test score or planning your GPA for the semester.
Frequently Asked Questions
- How do I calculate my percentage?
- Divide the marks you obtained by the total marks, then multiply by 100. Our Percentage Calculator does this instantly and checks your entries for errors.
- How is CGPA calculated?
- CGPA is generally the average of the grade points you earn across all your subjects or semesters. Enter each grade point into the CGPA Calculator to get your average.
- How do I convert CGPA to percentage?
- A common approach is to multiply your CGPA by 9.5. This gives an estimate — always confirm the exact formula with your institution, since conversion rules can vary.
- How is GPA calculated?
- GPA is a credit-weighted average: multiply each course's grade point by its credit hours, sum those values, then divide by the total credit hours.
- How is attendance percentage calculated?
- Divide the number of classes you attended by the total number of classes held, then multiply by 100. The Attendance Calculator also shows how many classes you need to reach a target percentage.